java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if6.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:19:32,864 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:19:32,867 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:19:32,881 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:19:32,882 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:19:32,883 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:19:32,884 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:19:32,886 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:19:32,888 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:19:32,888 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:19:32,890 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:19:32,891 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:19:32,891 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:19:32,892 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:19:32,893 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:19:32,896 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:19:32,898 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:19:32,910 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:19:32,912 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:19:32,913 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:19:32,914 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:19:32,916 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:19:32,916 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:19:32,916 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:19:32,917 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:19:32,918 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:19:32,923 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:19:32,924 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:19:32,925 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:19:32,926 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:19:32,926 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:19:32,927 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:19:32,927 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:19:32,932 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:19:32,933 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:19:32,934 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:19:32,956 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:19:32,956 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:19:32,956 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:19:32,957 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:19:32,960 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:19:32,960 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:19:32,960 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:19:32,961 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:19:32,961 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:19:32,961 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:19:32,961 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:19:32,961 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:19:32,962 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:19:32,962 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:19:32,962 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:19:32,962 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:19:32,962 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:19:32,963 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:19:32,964 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:19:32,964 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:19:32,964 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:19:32,965 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:19:32,966 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:19:33,011 INFO ]: Repository-Root is: /tmp [2018-06-25 13:19:33,027 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:19:33,032 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:19:33,033 INFO ]: Initializing SmtParser... [2018-06-25 13:19:33,034 INFO ]: SmtParser initialized [2018-06-25 13:19:33,034 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if6.c.smt2 [2018-06-25 13:19:33,035 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-25 13:19:33,122 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if6.c.smt2 unknown [2018-06-25 13:19:33,516 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if6.c.smt2 [2018-06-25 13:19:33,520 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:19:33,527 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:19:33,527 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:19:33,527 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:19:33,527 INFO ]: ChcToBoogie initialized [2018-06-25 13:19:33,531 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:19:33" (1/1) ... [2018-06-25 13:19:33,598 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:19:33 Unit [2018-06-25 13:19:33,598 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:19:33,598 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:19:33,598 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:19:33,598 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:19:33,618 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:19:33" (1/1) ... [2018-06-25 13:19:33,618 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:19:33" (1/1) ... [2018-06-25 13:19:33,640 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:19:33" (1/1) ... [2018-06-25 13:19:33,640 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:19:33" (1/1) ... [2018-06-25 13:19:33,650 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:19:33" (1/1) ... [2018-06-25 13:19:33,651 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:19:33" (1/1) ... [2018-06-25 13:19:33,654 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:19:33" (1/1) ... [2018-06-25 13:19:33,658 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:19:33,658 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:19:33,659 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:19:33,659 INFO ]: RCFGBuilder initialized [2018-06-25 13:19:33,659 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:19:33" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:19:33,676 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:19:33,676 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:19:33,676 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:19:33,676 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:19:33,676 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:19:33,676 INFO ]: Found implementation of procedure Ultimate.START [2018-06-25 13:19:34,026 INFO ]: Using library mode [2018-06-25 13:19:34,026 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:19:34 BoogieIcfgContainer [2018-06-25 13:19:34,026 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:19:34,028 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:19:34,028 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:19:34,031 INFO ]: TraceAbstraction initialized [2018-06-25 13:19:34,031 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:19:33" (1/3) ... [2018-06-25 13:19:34,032 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199ae905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:19:34, skipping insertion in model container [2018-06-25 13:19:34,032 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:19:33" (2/3) ... [2018-06-25 13:19:34,032 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199ae905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:19:34, skipping insertion in model container [2018-06-25 13:19:34,032 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:19:34" (3/3) ... [2018-06-25 13:19:34,034 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:19:34,043 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:19:34,052 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:19:34,102 INFO ]: Using default assertion order modulation [2018-06-25 13:19:34,103 INFO ]: Interprodecural is true [2018-06-25 13:19:34,103 INFO ]: Hoare is false [2018-06-25 13:19:34,103 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:19:34,103 INFO ]: Backedges is TWOTRACK [2018-06-25 13:19:34,103 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:19:34,103 INFO ]: Difference is false [2018-06-25 13:19:34,103 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:19:34,103 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:19:34,121 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:19:34,135 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:19:34,135 INFO ]: Found error trace [2018-06-25 13:19:34,136 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:19:34,136 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:19:34,143 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-25 13:19:34,146 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:19:34,146 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:19:34,193 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:19:34,193 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:19:34,193 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:19:34,249 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:19:34,342 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:19:34,344 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:19:34,344 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:19:34,345 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:19:34,356 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:19:34,357 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:19:34,359 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:19:34,419 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:19:34,419 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:19:34,419 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:19:34,420 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:19:34,421 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:19:34,432 INFO ]: With dead ends: 9 [2018-06-25 13:19:34,432 INFO ]: Without dead ends: 9 [2018-06-25 13:19:34,434 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:19:34,452 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:19:34,466 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:19:34,467 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:19:34,468 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:19:34,474 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:19:34,474 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:19:34,474 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:19:34,474 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:19:34,474 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:19:34,474 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:19:34,474 INFO ]: Found error trace [2018-06-25 13:19:34,475 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:19:34,475 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:19:34,475 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-25 13:19:34,475 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:19:34,475 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:19:34,476 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:19:34,476 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:19:34,476 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:19:34,561 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:19:34,702 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:19:34,702 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:19:34,702 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-25 13:19:34,717 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:19:34,828 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:19:34,837 INFO ]: Computing forward predicates... [2018-06-25 13:19:35,568 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:19:35,599 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:19:35,599 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:19:35,600 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:19:35,600 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:19:35,600 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:19:35,600 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:19:35,933 WARN ]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-25 13:19:36,028 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:19:36,029 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:19:36,029 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 13:19:36,029 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:19:36,029 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:19:36,030 INFO ]: With dead ends: 11 [2018-06-25 13:19:36,030 INFO ]: Without dead ends: 11 [2018-06-25 13:19:36,031 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:19:36,031 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:19:36,032 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:19:36,032 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:19:36,032 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:19:36,032 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-25 13:19:36,032 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:19:36,032 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:19:36,032 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:19:36,032 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:19:36,032 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:19:36,032 INFO ]: Found error trace [2018-06-25 13:19:36,033 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:19:36,033 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:19:36,034 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-25 13:19:36,034 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:19:36,034 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:19:36,034 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:19:36,034 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:19:36,034 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:19:36,225 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:19:36,910 WARN ]: Spent 377.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 6 [2018-06-25 13:19:36,932 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:19:36,932 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:19:36,932 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:19:36,940 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:19:37,088 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:19:37,088 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:19:37,094 INFO ]: Computing forward predicates... [2018-06-25 13:19:37,508 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:19:39,506 WARN ]: Spent 503.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 11 [2018-06-25 13:19:46,835 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:19:46,858 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:19:46,858 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-25 13:19:46,858 INFO ]: Interpolant automaton has 7 states [2018-06-25 13:19:46,858 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 13:19:46,858 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-25 13:19:46,858 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-25 13:19:46,949 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:19:46,949 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 13:19:46,949 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 13:19:46,949 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-25 13:19:46,949 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:19:46,950 INFO ]: With dead ends: 12 [2018-06-25 13:19:46,950 INFO ]: Without dead ends: 12 [2018-06-25 13:19:46,950 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-06-25 13:19:46,950 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 13:19:46,951 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 13:19:46,951 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 13:19:46,952 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 13:19:46,952 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-25 13:19:46,952 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:19:46,952 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 13:19:46,952 INFO ]: Interpolant automaton has 7 states. [2018-06-25 13:19:46,952 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 13:19:46,952 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 13:19:46,952 INFO ]: Found error trace [2018-06-25 13:19:46,953 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:19:46,953 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:19:46,953 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 3 times [2018-06-25 13:19:46,953 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:19:46,953 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:19:46,954 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:19:46,954 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:19:46,954 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:19:47,054 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:19:47,383 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:19:47,384 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:19:47,384 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:19:47,411 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:19:47,558 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:19:47,558 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:19:47,565 INFO ]: Computing forward predicates... [2018-06-25 13:20:05,953 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:20:05,976 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:20:05,976 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-25 13:20:05,976 INFO ]: Interpolant automaton has 8 states [2018-06-25 13:20:05,976 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 13:20:05,977 INFO ]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:20:05,977 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-25 13:20:06,142 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:20:06,142 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 13:20:06,142 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 13:20:06,142 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-25 13:20:06,142 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:20:06,143 INFO ]: With dead ends: 13 [2018-06-25 13:20:06,143 INFO ]: Without dead ends: 13 [2018-06-25 13:20:06,143 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2018-06-25 13:20:06,143 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 13:20:06,144 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 13:20:06,144 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 13:20:06,145 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 13:20:06,145 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-25 13:20:06,145 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:20:06,145 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 13:20:06,145 INFO ]: Interpolant automaton has 8 states. [2018-06-25 13:20:06,145 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 13:20:06,145 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 13:20:06,145 INFO ]: Found error trace [2018-06-25 13:20:06,145 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:20:06,145 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:20:06,145 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 4 times [2018-06-25 13:20:06,145 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:20:06,145 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:20:06,146 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:20:06,146 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:20:06,146 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:20:06,285 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:20:07,107 WARN ]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-06-25 13:20:07,267 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:20:07,267 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:20:07,267 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-25 13:20:07,282 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:20:07,400 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 13:20:07,400 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:20:07,405 INFO ]: Computing forward predicates... [2018-06-25 13:20:08,431 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:20:08,545 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:20:08,557 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:20:08,623 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:20:08,628 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:20:08,644 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:20:11,825 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 22 [2018-06-25 13:20:15,527 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:20:15,621 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-25 13:20:38,725 INFO ]: Timeout while computing interpolants [2018-06-25 13:20:38,925 WARN ]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:20:38,925 WARN ]: Verification canceled [2018-06-25 13:20:38,929 WARN ]: Timeout [2018-06-25 13:20:38,929 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:20:38 BoogieIcfgContainer [2018-06-25 13:20:38,929 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:20:38,930 INFO ]: Toolchain (without parser) took 65409.09 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 245.8 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:20:38,931 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:20:38,931 INFO ]: ChcToBoogie took 70.82 ms. Allocated memory is still 309.3 MB. Free memory was 245.8 MB in the beginning and 243.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:20:38,932 INFO ]: Boogie Preprocessor took 59.72 ms. Allocated memory is still 309.3 MB. Free memory was 243.8 MB in the beginning and 241.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:20:38,933 INFO ]: RCFGBuilder took 368.04 ms. Allocated memory is still 309.3 MB. Free memory was 241.8 MB in the beginning and 221.9 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 3.6 GB. [2018-06-25 13:20:38,933 INFO ]: TraceAbstraction took 64901.18 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 221.9 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:20:38,936 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 70.82 ms. Allocated memory is still 309.3 MB. Free memory was 245.8 MB in the beginning and 243.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 59.72 ms. Allocated memory is still 309.3 MB. Free memory was 243.8 MB in the beginning and 241.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 368.04 ms. Allocated memory is still 309.3 MB. Free memory was 241.8 MB in the beginning and 221.9 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 3.6 GB. * TraceAbstraction took 64901.18 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 221.9 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 13 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while DnfTransformerHelper was transforming 0 conjuction. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 64.8s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 5 SDslu, 60 SDs, 0 SdLazy, 26 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 30.1s InterpolantComputationTime, 65 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 1824 SizeOfPredicates, 18 NumberOfNonLiveVariables, 958 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/34 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if6.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-20-38-946.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if6.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-20-38-946.csv Completed graceful shutdown